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Air quality in San Jose

Air quality index (AQI⁺) and PM2.5 air pollution in San Jose • 09:33, Oct 30

Instituto Meteorológico NacionalJazmin Calderon Quiros
Instituto Meteorológico NacionalJazmin Calderon Quiros

Live most polluted city ranking

Real-time San Jose most polluted city ranking

#CitiesAQI⁺ US
1
The national flag of Costa Rica

San Jose

44

2
The national flag of Costa Rica

Sabanilla

38

Live cleanest city ranking

Real-time San Jose cleanest city ranking

#CitiesAQI⁺ US
1
The national flag of Costa Rica

Sabanilla

38

2
The national flag of Costa Rica

San Jose

44

Wildfires in San Jose

Real-time information

Active fires

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Aerial view of multiple houses covered in haze.
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China Air Quality Alert

Small group of people cycling in morning smog.
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India Air Quality Alert

Polluted skies of Almaty.
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October 28, 2026: Almaty among top 10 most polluted cities in the world

Which is the most polluted city in San Jose?